Win32:Vitro

5 July 2009 Virus 3 Comments

Win32:Vitro is a detection for a variants of a polymorphic viruses that has identical characteristics. Win32:Vitro will infect executable files in order to spread itself on computers and network environment.

Alias: Virus.Win32.Virut.ce, PE_VIRUX.A, Virus:Win32/Virut.BM, Trojan.Gen, Virus.Win32.Vitro

Damage Level: Medium

Systems Affected: Windows 9x, 2000, XP, Windows Vista

Characteristics
Win32:Vitro is a polymorphic type of virus which simply means, not only one instance may run on the system. Other variants with dissimilar characteristics may also endanger the system and infects a resemblance of executable files.

Win32:Vitro hides its presence from anti-virus application and may open a backdoor that allows a remote attacker to achieve unauthorized access on infected computer. From time to time, it tries to communicate to a distant server to download additional threats or update its present configuration.

Win32:Vitro behaves like any other viruses and Trojans. It possesses the following characteristics:

• Displays a number of advertisements
• Promotes a series of rogue security applications
• Download and install other threats
• Inject own code on executable files on hard drives and removable drives
• Attacks the network and access network-shared resources
• Receive commands from a remote attacker though Internet Relay Chat (IRC) servers

Added Registry Entries:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\policies\Explorer\Run = "%Windir%\cfdrive32.exe"
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run = "%Windir%\cfdrive32.exe"

Associated Files and Folders:

%Windir%\cfdrive32.exe

1. Temporarily Disable System Restore (Windows Me/XP). [how to]
2. Open your antivirus application and update the virus definition file. This method ensures that your antivirus program can detect even newer variants of Win32:Vitro

3. Start Windows in Safe Mode with Networking.
- From a power-off state, turn on the computer and press F8 on your keyboard repeatedly.
- Your computer will display Windows Advanced Boot Options menu. Please select Safe Mode with Networking.
- The system will now boot Windows and loads only necessary drivers and files.

4. Open your antivirus program and run a full system scan. After the scan, delete all infected items. If unable, better place them in quarantine. Once the scan is complete, please proceed with the next step.

Online Virus Scanner:

Another way to remove Win32:Vitro without the need to install additional antivirus application is to perform a thorough scan with free online virus scanner that can be found here or on websites of legitimate anti-virus and security provider.

5. Go to Online Virus Scanner list and run a virus scan. This may require plug-ins, add-on or Activex object, please install if you want to proceed with scan.
6. After completing the necessary download, your system is now ready for online virus scanning.
7. Select an option in which you can thoroughly scan the computer to make sure that it will find and delete entirely all infections not detected on previous scan.
8. Remove or delete all detected items.
9. When scanning is finished you may now restart the computer in normal mode.